Propeller



Sept. 26, 1933. E. w. CAYWOOD PROPELLER Filed. Sept. 16, 1932 2 Sheets-Sheet l Inventor Sept. 26, 1933. E. w. CAYWOOD PROPELLER Filed Sept. 16, 1932 2 Sheets-Sheet 2 Inventor w ajzooo 4 flllorney Patented Sept. 26, 1933 PATENT OFFICE PROPELLER Ernest Wesley Caywood, Bartlesville, Okla.

Application September 16, 1932 Serial No. 633,542

1 Claim.

This invention relates to a propeller the general object of the invention being to provide the propeller with four blades, two of which are located at the front end of the hub and the other two at the rear end of the hub, with a front blade being substantially parallel and spaced or offset from a rear blade.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or' corresponding parts throughout the several views, and in As shown in these views, the propeller comprises a hub 1 which is preferably of tapered shape as shown, and the numeral 2 indicates a pair of rear blades and the numeral 3 a pair of front blades. 7

Each blade is preferably of the cross sectional shape shown in Figs. 4 and 5. .As shown in Figs. 1, 2 and 3, one blade 2 has its inner end connected to the hub slightly to one side of the point of connection of the inner end of one of the blades 3 with the hub, with a set of blades 2 and 3 sub- (Cl. 170-165) V .stantially opposite the other set of blades 2 and 3 with the inner portion 6 of each set curving slightly away from each other, so that one blade of each set travels in advance of the other blade of each set as shown in Fig. 2. The major portions of the blades of each set substantially parallel each other as shown.

This arrangement provides a propeller which will impart more speed to the craft to which it is attached than propellers as now constructed, and with less power.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts provided that such changes fall within the scope of the appended claim.

Having thus described my invention, what I claim as new is:

A propeller of the class described comprising a hub, a pair of front blades having their inner ends connected to the front ends of the hub at substantially diametrically opposite points, a pair of rear blades having their inner ends connected with the rear end of the hub at substantially diametrically opposite points, the point of connection of the front blade with the hub being slightly spaced circumferentially from the point of connection of its companion rear blade and the inner portion of each front blade and its companion rear blade slightly curving away from each other to space each front blade from its companion rear blade.

ERNEST WESLEY CAYWOOD. 

